login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A271405 Number of nXnXn triangular 0..6 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all equal. 0

%I #3 Apr 06 2016 09:59:02

%S 0,0,15,11244,133557336,19403620120548,21047213682560996208,

%T 149800609621920261292052832,6977143669666797212087528454453012,

%U 2148748829446463101953971811931782270725784

%N Number of nXnXn triangular 0..6 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all equal.

%C Column 6 of A271407.

%e Some solutions for n=4

%e .....0........0........0........0........0........0........0........0

%e ....1.2......0.1......1.1......1.1......1.2......1.1......1.2......1.0

%e ...1.2.2....2.2.1....0.1.0....0.0.2....3.3.3....0.1.0....1.0.0....0.2.2

%e ..3.1.2.1..3.2.1.2..1.2.1.0..2.0.2.3..3.2.3.4..2.3.1.0..3.0.0.2..0.2.2.1

%Y Cf. A271407.

%K nonn

%O 1,3

%A _R. H. Hardin_, Apr 06 2016

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 13:04 EDT 2024. Contains 371945 sequences. (Running on oeis4.)